Hypodermic syringe.



Dec. 27, 1927.

Re. 16,836 H. S. COOK HYPODERMIC SYRINGE Original Filed Oct. 21. 1916 w ovwzm 5 7y, .r W

Reiaued Dec. 27, 1927.

UNITED STATES Re. 16,836 PATENT OFFICE.

HARVEY S. COOK, OF VALPARAISO, INDIANA, ASSIGNOR T COOK LABORATORIES, INC., OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

HYPODEBMIC SYBINGE.

Original No. 1,231,497, dated June 26, 1817, Serial No. 126,984, filed October 21, 1916. Application 01 reissue filed July 1, 1821. Serial No. 481,993.

This invention relates to syringes and particularly to hypodermic syringes and has for its object to provide a practicable and rc-- With this as the principal object in View,

the invention consists in the novel construction, combination and arrangement of parts hereafter described and pointed out in the appended claims and illustrated in the accompanying drawing, in which:

Figure 1 is a side elevation of the syringe;

Fig. 2 is a longitudinal sectional view of the instrument without its fluid medicament container;

Fig. 3 is a cross sectional view on the line 33 of Fig. 2, and I Fig. 4 is a similar View on the line 44, Figs. 3 and 4 being shown on a larger; scale.

Fig. I) is a longitudinal section showing the structure or organization of the instrument including its fluid medicament container. v

In the drawings, 10 indicates a barrel or cylinder of the syringe, in one end of which and extending substantially one-half the length of the barrel is a chamber 11 for receiving a container of the solution to be injected, while the other half of the barrel has a bore 12 extending from the chamber 11 to the opposite end and of slightly less diameter than the chamber. Through thebore l2 slides a plunger 13 of a length sufficient to extend through the bore and into the chamber nearly to its opposite end when wholly depressed. The plunger 13 is cylindrical as shown and of the same diameter from its inner end 14 to its outer end which is provided with a button 15 to be grasped by the fingers for operating the plunger and has a shoulder 16 that forms a stop and abuts against the upper end of the barrel 10. The lower or outer end of the chamber 11 is closed by a cap 17 that fits snugly over the end of the barrel and is locked in place by pins 18 that project radially from the exterior of the barrel and engage slots '19 in the side of the cap, said slots having inclined walls 20 that, bearing against the pins 18 when the cap is rotated, lock said cap on the barrel. v

Projecting axially from the cap is a threaded stem 21 on which a nut 22 is screwed, said nut serving as a coupling member for securely holding the clamping jaws on the stem 21 and the needle 24 firmly in position. The needle 24 passes through an opening in the stem 21 and the cap 17 and may slide longitudinally therein whenever the nut 22 is unscrewed and the jaws 23 loosened, but as soon as the jaws are tight-- cued on the needle, the latter becomes fixed anldlgigid with the cap and with the bar re The needle 24 is hollow as usual and the two ends pointed so that either end may be used for insertion beneath the skin.

A syringe constructed as described is quickly filled and easily cleaned owing to the fact that the cap and plunger may both be removed without trouble from the barrel. The plunger frame being cylindrical, being of equal diameter from end to end and with out packing aifords no means for lodgment of dirt thereon or the retention of the substance in the barrel. The chamber within the barrel is preferably straight from one end to the small shoulder where the bore begins and said bore is of the same diameter throughout its length. The needle is easily removed from the cap to enable the same to be cleaned or sterilized and the cap being preferably smooth on its inner side offers no corners for the lodgment of any unsani'f so tary particles. The liquid to be injected is' carried ji container or ampul 25 made of glass inft'ub' lar form open at the ends and of a length to fit within the chamber 11. The ends of the container are closed and sealed by disks 26 of rubber, cork, or material that is readily perforated by the inner projectin end of the needle 21. In using the container, the cap 17 of the syringe is removed and the plunger withdrawn into the bore 12 after which the container is inserted in the chamber 11 and the cap 17 replaced, by which means the inner end of the needle punctures the closure 26 and projects intothe con-- tainer. Pressure on the plunger forces the upper closure through the container and the liquid therein through the needle. j K

By using containers such as describedq a great deal of time and trouble is saved as the contents of the containers are properly} proportioned for injection and they contain the proper amount for an injection. A consubstantially um tainer comprisin" a straight glass tube of orm bore having sealing closures consisting of rubber or cork plu s in the opposite ends of the tube, is simp e and racticable as a container for hypodermic medicament, and the sealing lug pierced by the inner end or extension 0 the 1 dermic needle, bein terial such as rubber or t e like, will closely hug the shank of the needle so as to prevent lea age or flow of fluid except through the needle, and will be self-sealing if the needle is withdrawn, so that there is no dan er of contamination of the medicament flui since there is no contact of the fluid with any part of the instrument excepting the sterilized needle. The resilient or yieldable material composing the sealing plugs also adapts them to conform to. any slight irregularities in the inner bore of the tube to make eflective maling closures and enables the slidable plu at the end opposite ,to the needle to be force through the tube without liability of cracking the glass. In the particular form shown, the sealing plugs on closures are duplicates, so that the container or ampul is reversible. The barrel constituting the holder for the medicament container or ampul, being properly proportioned to receive the same, has the hy odermic needle removably aflixed to one en so that the needle may be sterilized before assembly with the medicament container and has at its other end the plunger arranged and adapted to enter the glass tube to expel the fluid contents through the needle. The sealed ends of the medicament container seat in this instance against the its extreme inward position, it is not likelyhead or cap 17 and the shoulder provided by the junction between the chamber 11 and the bore 12. Inward movement of the plunger is limited in this instance by the shou der or stop 16, so that when the medicament is discharged and the plunger is in to injure the point of the needle as will be ap arent from Fig. 2.

at I claim is: a

1. A ringe comprisin a barrel having a straig t cylindrical c amber extendin thereinto from one end midway its lengt and a bore of less diameter extending from the chamber through to the opposite end, a cap containing a needle removably secured to the chamber end of the barrel, and -a straight cylindrical lunger of uniform di-' thereinto at one end and extending midwaiy its length, and a bore of less diameter exten ing from said chamber to the opposite end of the barrel, a cap-movably fitted to the chambered end of the barrel and having proof resilient majecting 'aws, a needle extending throu h said cap ant between the jaws and adapte to be rigidly secured by means of said jaws to the cap, and a straight cylindrical lunger' of uniform diameter slidable through said bore and into the chamber.

3. A syringe com rising a barrel havin a chamber in one en thereofextending mi way its length and a strai ht cylindrical bore through its opposite end, the bore and the chamber communicating, a removable needle secured to the chambered end of the barrel, and a plunger of uniform diameter mounted in the bore to be pressed into the chamber and till the same.

4. A syringe comprisin astra'i ht cylindrical barrel having a cl amber formed in one end and extending miday the length thereof, and a bore of less diameter than the chamber extending from the chamber to the op )osit'e end of the barrel, a strai ht c lindrical piston of uniform diameter s idab e in said bore and into the chamber, pins projecting laterally from-the outer surface of the barrel near the chambered end, a ca having locking slots adapted to fit on sai barrel end and engage said pins by means of said slots for locking said cap in position, clamping jaws on the outer end of said cap, a needle passing throu h a perforation 1n the cap and between said jaws, and clamping means for operating the jaws .to needle.

5. A syringe comprising in combination, a

barrel having a longitudinal chamber and a' bore in communication with one end thereof a removable needle secured to the other end of the barrel; a plunger in the bore con,- structed and arranged to be pressed into the chamber; and a removable, unitary medicament-dis ensing container constructed and arran e to be inserted in the chamber to provide acharge of medicament for an injlection; said container comprising a tube aving sealing closures of resilient material at its opposite ends; one of said closures being adapted to be pierced to permit ejection of the medicament; the other closure-being movable through the tube by means of the plunger, thereb dispensing the contents of the container without liability of contamination; each of said closures being of a material which is not injurious to the fluid medicament contained Within the package, and at least one of the closures bein so made that when ierced by a needle, it c oses around the shan of the needle to prevent leakage or flow except through the needle,

grip the and after withdrawal of the needle is selfscaling to prevent contamination or loss of the medicament. g

6. A syringe comprising, in combination, a barrel having a straight chamber open at one end, and a straight bore through its up posite end, the bore and the chamber commu-' bular body; a resilient closure inserted in each end of the tubular body to seal it; the

inner end of the needle pierc ng one closure;

' the plunger sliding the'othe r closure throu h Ill the tubular body toward the needle to d1s pense the contents through the needle; each of said closures being of a material which is quite resilientso that the closures accommodate themselves to tubes havin small irregularities in internal bore, and which is not injurious to the fluid medicament contained within the package; and at least one of the closures being so made that when pierced by the needle, it closes around the shank of the needle to prevent leakage or flow except through the needle, and after withdrawal of the needle is self-sealin" to prevent contamination or loss of the medicament.

7. A syringe comprising a barrel having a straight chamber in one end thereof extending midway its length and a straight c lindrical bore through its opposite end, t e bore and the chamber communicating. a removable needle secured to the chambered end of the barrel, a plunger of uniform di-' ameter mounted in the bore and adapted to be pressed into the chamber, and a remov-x able container for the fluid to be injected of a size capable of being inserted in the chambered end of the syringe and having perforatable closures at its ends movable longitudinally in the container.

8. A hypodermic s ringe comprising, in combination, a barre a removable hypodermic needle attached to one end of the barrel and having an inwardly protruding pointed extension in communication with the injecting point of the needle; a removable sealed container of fluid medicament mounted in the barrel, said container comprising a tube having an end sealing closure consistin of a plug of resilient material such as rubber or the like adapted to be readily pierced by said needle extension and to close around the same to prevent leakage or flow of fluid except through the needle and which will be self-sealing if the needle is withdrawn, said tube having an opposite end closure consisting of a plug adapted to be forced through the tube to expel the fluid contents through the needle; and a plunger associated with the barrel and arranged to enter said tube to force in said opposite plug.

9. A hypodermic syringe comprising, in combinatlon, a sealed container of fluid medicament comprising a straight glass tube of substantially uniform bore having sealing plugs in its opposite ends; a barrel to receive said tube; a removable hypodermic needle attached to one end of the barrel and having a pointed extension in communication with the injecting point of the needle and which projects axially into the barrel to pierce the sealing plug at one end of said tube; the said plug being readily pierceable by said needle extension and consisting of resilient materialsuch as "rubber or the like which will close around said needle extension to prevent leakage or flow of fluid except through the needle and which will render the plug self-sealing if the needle extension is withdrawn; the o oslte plug adapted to be pushed through sai tube to expel the fluid contents through the me dle; and a plunger associated with the barrel and arranged to enter said tube to push in said opposite plug.

10. A hypodermlc syringe comprising, in

combination, a barrel; a sealed container of fluid medicament therein comprising a straight glass tube of substantially uniform bore having sealing closures consisting of resilient plugs of rubber or the like secured in opposlte ends of the tube; a removable hypodermic needle attached to one end of the barrel and having a pointed extension in communication with the injection point of the needle and which extends axially into the barrel to ierce the resilient plug at one end of the tu c, said plug being readily pierceable thereby and the opposite plug adapted to be forced through the tube to expel the fluid contents through the needle; and a plunger associated with the barrel and arranged to enter said tube to force in said opposlte plug.

11. A hypodermic syringe comprising, in combination, a sealed container of fluid medicament comprising a tube having an end sealing closure consisting of a resilient plu of rubber or the like adapted to be 1 rea ily pierced by a hollow needle and to close around the same so as to prevent leaka e or flow of fluid except through the needle and which will be self-sealing if the neev dle is \vthdrawn, and having an opposite endclosure consisting of a plug adapted to be forced through said tube to expel the fluid contents through the needle; and means associated therewith comprising a holder in which said tube is mounted having the said needle removably aflixed' thereto and arranged to pierce said first-mentioned plu and having a plunger adapted and arranged t i enter said tube to force in the opposite p ug.

12. A hypodermic s 'ringe comprisin in combination, a. scale container of uid medicament comprising a straight glass tube of substantially uniform bore having sealing plugs in its opposite ends, at least one of I the needle and which will be. sel -sealing if plufis'bein readily piereeable by'a hollow nee le an consistin of resilient material such as rubber or the like which will close around the shank of theneedle to prevent leakage .or flow of fluid exce t through the needle is withdrawn, and the other of which plugsis ada ted to be forced through the tube to expel t e fluid contents through the needle; and associated means comprising a holder in which said tube is mounted having the needle removably aflixed thereto and arranged to pierce said first-mentioned plu and having a plunger adapted and arrange to enter said tube to force in the-opposite 13. A hypodermic s ringe comprising, in

combination, a. scale container offluid medicament comprising a straight glass tube havin sealing closures consisting of resilient plilgs of rubber or the like secured in opposite ends ofthe tube; and associated means comprisin a holder in which said tube is mounted having a removable needle arranged to pierce one of said plugs and having a plunger adapted and arranged to enter said tube to force the vopposite plug therethrough to expel the fluid contents A through the needle.

14. A hypodermic syringe comprising, in combination, a sealed medicament container having an end wall of resilient material adapted to be pierced by a hollow needle and to close around the same so as to prevent leakage or flow of fluid exceptthrough the needle and which will be self-sealing if the needle is withdrawn, said container constructed .to have its interior volume reduced for expelling the fluid through the needle; and associated means comprisin a holder in which the container is remova ly mount- -ed having said needle removably attached thereto in position to pierce the said resilient end wall of the container and having means cooperative with the container for reducing its interior volume to expel its contents through the needle.

15. A hypodermic s ringe cartridge comprising a sealed flui -containing tube for use as a separable operative component of a syrin organization having a plunger at one en and an inwardly projecting needle at the other end, said tube havin plu in its opposite ends, including a p ug 0 resilient material such as rubber or the like adapted to be pierced by the needle and mass which will seal around the needle and will be self-sealing if the needle is withdrawn, the other plug adapted to be pushed inwardly by thelplunger to expel the fluid through such niche. .d

16. ypo ermic syringe comp'ris' in combination, a sealed medicament confine comprising a tube having an end sealing closure consisting of a plug of resilient material such as rubber or the like adapted to be pierced by a needle and to close around the same to prevent leakage or flow of fluid except through the needle, said tube having an opposite end closure consisting of a plug adapted to beforced through the tube to expel the fluid contents through the needle; associated means comprising a holder in which the container is removably mounted.

and having a plunger arranged to enter said tube to force in said opposite end closure for expelling the contents of the container through the needle; and a hollow needle in position to pierce the said resilient and wall of the container.

17. A hypodermic syringe comprising, in

combination, a sealed medicament container having an end wall of resilient material adapted to be pierced by a hollow needle and to close around the same so as to prevent leakage or flow of fluid except through the needle; said container constructed to have its vinterior volume reduced for expelling the fluid through the needle; associated means comprising a holder in which the container is removably mounted, and

having means cooperative with the container for reducing its interior volume to expel 7 its contents through the needle; and a hollow needle in osition to pierce the said re silient end wal of the container.

18. A hypodermic s 'ringe cartridge comprising a sealed flui -containin tube for use as an operative component 0 a syringe organization, said tube having plugs in itsopposite ends, including an imperforate plug of resilient material such as rubber or the like adapted to be pierced by a needle and which will seal around the needle so as to prevent leakage or flow of fluid except through the needle, the other plug ada ted to be pushed inwardly to expel the uid throng such needle.

In testimony whereof I aflix my signa- HARVEY S. COOK. 

